Foil tank



FIG. 1 is a top perspective view of a foil tank showing my new design;

FIG. 2 is a front elevational view thereof, the opposite right and left side not shown is a mirror image thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is an exploded top perspective view thereof; and,

FIG. 6 is an exploded bottom perspective view thereof. 

CLAIM The ornamental design for a foil tank, as shown and described. 